Typewriting-machine



N. HoRN. TYPEWRITING MACHINE.

I APPUCAYION FILED NOV- 6 1917. 1 ,343,509. Patented June 15, 1920.

Nw Nm ,R R km@ M W w UNITED STATES PATENT OFFICE.

NICHOLAS HORN, OF PATERSON, NEW' JERSEY, ASSIGNOR T0 UNDER/WOOD TYPE- WRITER COMPANY, OF NE'W YORK, N. Y.,

[i CORPORATION OF DELAWARE.

TYPEWRTTING-MACHINE.

Specification of Letters Patent.

Patented J une 15, 1920.

Application filed November 6, 1917. Serial No. 200,477.

lengthwise of the platen, so as to accommodate sheets of different widths. ln order to hold the paper-fingers tight on the platen,

when in their active positions, strong springs are used. These springs when effective prevent the easy adjustment of the paperfingers lengthwise of the platen. Provision is therefore made in the present case for relieving the relatively moving parts of the thrust of the spring when it is desired to adjust either paper-finger. Thus there will be little or no tension tending to create en cessive friction holding` the lingers against sliding adjustment. This arrangement includes a rod parallel to the platen on which a sleeve for each linger is splined. Each paper-finger is rotatably mounted on its sleeve. When it is in its active position, each paper-finger is forced toward the platen by a spring controlling` a pair of rollers, which are eccentrically located in a pair of cavities provided in the corresponding sleeve. lVhen it is desired to swing either finger away from the platen for longitudinal engagement along the rod, the pressure of the spring is relieved by an eccentric cam, which forces both arms of the spring outwardly to relieve the pressure on the rollers. This enables a papeiiinger as a whole to be slidden easily along the rod, as the tension which the spring places on the sliding connection between he rod and sleeve is relieved.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a perspective view, showing the left-hand finger as in its active position in engagement with the platen.y

Fig. 2 is a vertical section, taken from front to rear, showing the right-hand linger in its active position in engagement with the platen.

Fig. 3 is an enlarged detail section, taken longitudinally of the rod or shaft on which the paper-fingers are mounted.

Considering more specically the parti@ ular parts of the invention as embodied in the form shown in the drawings, the platen 1 is mounted to rotate on a carriage 2. The platen 1 1s rotated in the usual manner either by knobs 3 or lipe-space mechanism il. For the purpose of holding the work-sheet on the platen at the printing point, indicated at 5 by a type-bar, there are provided a pair of paper-fingers 6 facing inwardly toward each other. A left-hand paper-finger is shown in Fig. 1 and a right-hand paperfinger is shown in Fig. 2. These paperfingers are slidingly and pivotally mounted on a rod or shaft 7, which is secured at its ends in the frame of the carriage 2. Each paper-nger includes a roller 8, which, when the paper-finger is in action, engages with the platen 1, or at least with the work-sheet carried by the platen. The roller 8 is mounted in a spring bracket 9, which, in turn, is supported by an inwardly-turned VHarige 10 of an arm 11. The arm 1l is formed integral with a channel-shaped frame 12, having openings through which the shaft 7 extends.

The channel 12 does not engage'directly with the shaft 7, but is mounted on a sleeve 13 located between the shaft and the channel 12. The sleeve 13 is provided with a spline or key 14, which extends into slots 15 and 16 on the sleeve and shaft, respectively. This forms a sliding connection between the sleeve and the shaft, and as the channel 12 is pivoted on the 6 has a sliding and pivotal mounting with respect to the shaft 7. Thechannel 12 and the parts carried thereby are held against slipping off the ends of the sleeve 13 by the turning up of the ends of the key or spline 14: at 17 and 18. A

To hold the roller 8in tight contact with 'the platen 1, there is provided a strong bowspring 19, which has a pair of arms 2() and 21 extending on opposite sides of the sleeve 13. These arms 2O and 21 engage rollers sleeve 13,. the paper-linger 22 and 23 eceentrically located in cups or..

y strength is formed which ,hold the paper-finger tight on sockets 24: and 25, provided in the sleeve 13. The rollers 22 and 23 are mounted in slots 26 provided in the arm 11 of the paper-fingers 6. This enables the rollers 22 and 23 to move toward and from the axial center 0f the shaft 7. The arms of the bow-spring 19 are arched at their points of engagement With the rollers 22 and 23 to form sockets and so that they force the rollers 22 and 23 to tend to seat themselves properly in their sockets. But as the pressure roller 8 comesV into engagement With the platen 1 before this can take place, there is always a force exerted by the paper roller 8 on the platen 1. This force reacts on the spline connection 14', 15 and 16 between the sleeve 13 and the shaft 7, so that each paper-finger is locked against accidental displacement longitudinally of the shaft 7 and the platen 1.

The force holding the paper roller 8 tight on the platen 1 and y preventing accidental displacement of the paper-finger as a Whole, vvvould also interfere with the adjustment of the paper-linger if it were desired to shift the same to accommodate work-sheets of different Widths. To prevent this, the pressure of the bow-spring 19 on the rollers 22 and 23 is relieved When necessary to shift a paperfinger. For this purpose, there is provided a finger-piece 27, which is pivoted at28 to the cross-piece of the channel 12, and has formed thereon a double eccentric cam 29 engaging with extensions 30 of the arms 20 and 2l. This cam 29 lies between the eX- tensions 30, so that When the linger-piece 27 is swung about its vertical pivot, it will. spread the arms 2O and 21, taking the pressure from off the rollers 22 and The linger-piece can new be adjusted along the shaft 7 either in active position in engagement with the platen 1, or in inactive position away from the platen Without much frictional resistance between the sleeve 13 and the shaft 7. rl`his is because of the fact that the pressure of the spring tending to has been taken up by the Ycam 29. Y

The particular form of the bow-spring 19A is seen by reference to Figs. 1 and The arms 2() and21 have each three forks, the

middle one of which forms the extension 30.

These three forks are provided with the bends or curves engaging the rollers .22 and 23' at several points along their lengths; thus a .multiple spring of considerable exerts suflicient Y tension to hold the paper-finger in active The effective linger-piece 27 engagement ivith'the platen 1. shifting of the relieving takes this tension `entirely olf of the shaft 7, and thus enables the paper-linger to be practically' lightly pivoted and slidingly mounted on the shaft 7. The bow-spring 19 is svvingingly mounted, as seen in 3, by meansof cones 31 engagingin pivot mounted, a sleeve splined on s *Y Vand said the platen Y openings`32, provided in the channel 12 of the paper-lingers.

Thepaper-lingers 6 are identical for the left and right sides of the platen 1, except that they face in opposite directions; that is to say, the [ianges 10 extend inwardly from the arms 11 mounted on the outer sides of the channels 12. The fingers are adjustable toward each other on the shaft 7 to accommodate Work-sheets of varying widths, and are adjusted pivotally With respect to the shaft 7 to shift betvveen active and inactive positions.

It should be understood thatV the paperfinger may be relieved of the spring tension by moving the handle or finger-piece either leftivardly or .rightwardly `'.`l1us, when it is desired to move the paper-linger left- Wardly, the finger-piece 27 is moved left- Wardly about its pivot 28, until the paperifinger has been relieved of the spring tension, after which thehandle moves bodily to move the paper-inger toivard the left until the latter is adjusted to the proper position. `When adjusting the paper-finger toiifard the right the action Will be the same as above described, ez-:cept that 'the movements of the linger-piece 27 and the paperfinger 6 ivill be in reverse directions.

I have preferably mounted the channel or yoke 12 on the sleeve 13, and have provided the sleeve with 2st and 25 in which the spring-pressed rollers 22 and 23 engage; but it snould be understood that variations may be resorted to Within the scope of the invention, and portions of the iinprovements may be used Without others.

Having thus described my invention, l claim:

1. rlhe combination. -with Va platen, of a paper-finger for said platen., a shaft on which said finger is slidingly and pivotally j' id shaft, spring means reacting between' said sleeve linger for causing said finger to grip said platen. and also causingsaid slr-eve to bind on said shaft,'so as to prevent accidental movement of said finger-,rand cam means separately operated with respect to the sliding and pivotal movement of said finger for taking upthe tension of said spring means, so as torelicve said shaft. said sleeve and said linger of the action and reaction thereof.

2. The combination with paper-linger for said platen, a support for said finger, a mounting` member having a slidable but non-rotative connection with said support, and a rotative but non-slidable connection with said finger, said mounting member having a socket therein, a roller in engaging relation with saidfsoclret and having a guiding connection with said finger for determining its relative direction of movement, and means, incli'iding-.a resilient a platen, of a member, normally tending to seat said roller accurately in said socket, said means being opposed by the engagement of said paperinger with said platen, whereby said paperlinger will be normally under a pressure so as to tightly engage said platen.

3. 'lhe combination with a platen, of a paper-finger for said platen, a shaft on which said paper-finger is slidingly and pivotally mounted, a sleeve splined on said shaft having a socket therein, said sleeve being loosely interposed between said linger and said shaft, whereby said linger may pivot about said sleeve and about said shaft, a roller located in said socket and having a pin-andslot connection with said finger, spring means tending to seat said roller accurately in said socket, opposed by the engagement of said paper-finger with said platen, whereby said paper-finger will be normally under a pressure so as to tightly engage said platen, and means for taking up the tension of said spring means so as to relieve said roller and the parts reacting therewith from the tension of said spring means', whereby said finger may be easily shifted along said shaft.

et. rEhe combination with a platen, of a paper-finger for said platen, a shaft on which said paper-finger is slidingly and pivotally mounted, a sleeve splined on said shaft and interposed between said paper-finger and said shaft, said sleeve having a pair of sockets therein, rollers located in said sockets and connected to said paper-finger, and a bowspring having arms extending on opposite sides of said sleeve and engaging said rollers tending to seat said rollers accurately in said sockets, so as to cause said paper-finger to grip said platen, the axis of rotation of said platen, the center of said shaft and the point of contact of said paper-finger with said platen being so relatively disposed that the movement of said paper-finger is obstructed before said rollers properly seatV themselves in said sockets, whereby said bow-spring will normally exert continuous pressure, holding said paper-finger in tight engagement with said platen.

5. The combination with a platen, of a paper-finger for said platen, a shaft on which said paper-finger is slidingly and pivotally mounted, a sleeve splined on said shaft and interposed between said paper-finger and said shaft, said sleeve having a pair of sockels therein, rollers located in said sockets and connected to said paper-linger, a bow-spring having arms extending on opposite sides of said sleeve and engaging said rollers tending to seat said rollers accurately in said sockets, so as to cause said paper-finger to grip said platen, the axis of rotation of said platen, the center of said shaft and the point of contact of said paper-finger with said platen being so relatively disposed that the movement of said paper-linger is obstructed before said rollers properly seat themselves in said sockets, whereby said bow-spring will normally exert a continuous pressure, holding said paper-finger in tight engagement with said platen, and relieving means interposed between the arms of said bow-spring, so as to take up the tension thereof and thus relieve the tension between said sleeve and said paper-finger and said sleeve and said shaft, whereby said paper-finger may be easily adjusted along said shaft.

(3. rl'he combination 'with a platen, of a paper-finger for said platen, a shaft on which said paper-linger is slidingly and pivotally mounted, a sleeve interposed between said paper-linger and said shaft and splined on said shaft, locking means interposed between said sleeve and said paper-finger including a bow-spring pivotally mounted to move with said paper-finger and having arms eX- tending on opposite sides of said sleeve, and means mounted to move with said paperiinger interposed between the arms of saidV bow-spring, so as to spread them to render said bow-spring ineffective.

. 7. The combination with a platen, of a paper-finger for said platen, a shaft on which said paper-finger is slidingly and pivotally mounted, a sleeve interposed between said paper-finger and said shaft, locking rollers interposed between said shaft and said paper-linger, a bow-spring having arms extending on opposite sides of said sleeve engaging said rollers to cause them to yieldingly lock said paper-finger relatively to said sleeve and to said platen, a cam interposed between the arms of said bow-spring and mounted to move with said bow-spring and said paper-finger, and means for rotating said cam, so as to control the activity and inactivity of said bow-spring and said locking rollers.

8. The combination with a platen, of a paper-finger for said platen, a shaft on which said paper-finger is slidingly and pivotally mounted, a sleeve splined on said shaft having a pair of sockets therein, a bow-spring mounted on said paper-linger having arms extending on opposite sides of said sleeve withcbands to Jform sockets in register with the sockets of said sleeve, rollers eccentrically located in opposed sockets of said sleeve and said spring arms,

normally tending to properly seat themselves, so as to cause said paper-finger to eX- ert pressure on said platen, and means for spreading said spring arms, so as to increase the space in which said rollers are located, relieving the pressure between said rollers, said sleeve and said finger, and also between said sleeve and said shaft, whereby said linger may be easily adjusted.

9. The combination with a platen, of a paper-finger, a support on which said paperfinger is slidingly and pivotally mounted,

spring means re-acting between said paperfinger and said support to exert a pressure on said platen, and a finger-piece pivotally mounted on said paper-finger adapted to adjust said paper-finger lengthwise of its support, said finger-piece having a movement substantially in the direction in which the adjustment of said paper-finger is to take place, so as to first relieve the strain oi said spring means between said paper-finger and said support before the paper-finger is moved.

l0. rlllhe combination with a platen, of a paper-finger for said platen, a support for said nger, a mounting member having a slidable but non-rotative connection with said support, and a rotative but non-slidable connection with said finger, means comprising a resilient member normally tending to rotate said finger about said mounting member in a direction such as to hold it in snug contact with said platen, a finger-piece, and means controlled by said finger-piece for taking up the tension of said resilient inember and thusk rendering the same ineifective upon said paper-finger, whereby said paperfinger may be easily adjusted relative to the support.

11. The combination with a platen, of a paper-finger for said platen, a support for said finger, a mounting` member having` a slidable but non-rotative connection withV said support, and a rotative but non-slidable connection with said finger, said mounting member having a socket engaging relation with said socket and having a guiding connection with said linger, for determining its relative direction of movement, means including a resilient member, normally tending to seat said roller accurately in said socket, said means being opposed by the engagement of said paper-finger with said platen, whereby said-paperfinger will be normally undei.' a pressure so as to tightly engage said platen, a fingerpiece, and means controlled by said lingerpiece for taking up the tension of said resilient member, so as to render it ineffective on said paper-finger, whereby said paperiingger may be easily shifted along said suppor therein, a roller in l2. Thefconibination with a laten ofa P i paper-finger, a support on which said papernner is movabl mounted so as to be adjustable axially of said platen, means, ini .paper-linger, and means, controlled byl such relative movement Vof said finger-piece, for taking up the tension of said resilient member, so as to render it ineective on said paper-finger, whereby, on application of pressure to said finger-piece in the direction or' adjustment of said paper-finger, it will first be moved relatively to Vsaid paper-finger, so as to render said resilient member ineffective and, on continuation of the application of suchpressure in the same direction, said linger-piece may be moved to an adjustable position free from opposing influence by said resilient member.

13. The combination with a platen, of a paper-finger, a support on which said paperlinger is movably mounted, so as to be adjustable axially of said platen in either of two directions, resilient means normally eX- erting a holding` pressure between said paper-finger and saidY platen, a .finger-piece mounted on said paper-finger and relatively movable with respect thereto on application of pressure in either of its two directions of adjustment, and means, controlled by such relative movement of said finger-piece, for taking up the tension of said resilient member, so as to render it ineffective on said paper-finger, whereby, on application of pressure to said finger-piece in either of its two directions of adjustment, it will first be moved relatively thereto so as to render said resilient member ineffective, and on continuation ofthe application of' such pressure in the same direction, said paper-finger may be moved to an adjusted position free from opposition by said resilient member.

NICHOLAS HGRN. Witnesses CATHERINE A. NEWELL, ELLA A.. JoLIDoN. 

